Keysight N5224B/25B Service Guide 7-13
Repair and Replacement Procedures
Removing and Replacing the A1–A3 and Other Front Panel Subassemblies
Removing the Speaker Assembly
1.
Disconnect the speaker cable from the interface board.
2.
Remove the speaker assembly and speaker foam.
Removing the A3 Display Assembly and the Touchscreen
1.
Disconnect the following cables from the A1 front panel interface board:
tape (item [14]) from connector and the LCD display to interface board
cable (item [18]), LED driver board (backlight converter board) to interface
board (item [11]), touch screen controller board to interface board cable
(item [13]), power switch board to interface board cable (item [12]), and
the speaker assembly cable.
2.
Remove eleven outer screws (item
) from the A3 display assembly’s
mounting plate and remove the A3 display assembly from the front panel
assembly.
3.
Raise the retaining clamps on the LCD display flat flex cable’s two
connectors (item [15]).
4.
Disconnect the flat flex cable from the touchscreen (item [15]).
5.
The LED driver board cable (item 22) can be removed from the connection
on the LCD Display.
6.
The LCD display cable (item [18]) can be removed by removing the three
screws (item [17]) that attach it to the LCD display mounting bracket.
7.
Remove the 3 screws on the slotted hole side of the mounting plate (item
[20]).
8.
Remove the 3 screws on the round hole side of the mounting plate (item
[20]).
9.
With a T-6 TORX (set to 3-in-lb), remove the 2 screws (item [23]) on the
side bracket that has the LCD cable (item [18]) attached to the LCD
display.
10.
With a T-6 TORX (set to 3-in-lb), remove the 2 screws (item 23) on the
2nd side bracket (item [21]).
When handling the speaker avoid touching the top of the speaker. Hold
only the sides of the speaker when re-attaching the new foam.
Avoid covering the Mounting Plate screw.
During re-assembly of the side brackets to the LCD display, it is very
important to avoid over-tightening.
During re-assembly of the side brackets to the LCD display, it is very
important to avoid over-tightening.
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Страница 212: ...5 50 Keysight N5224B 25B Service Guide Theory of Operation Receiver Group Operation 5 Figure 5 17 4 Port Receiver Group...
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Страница 225: ...Keysight N5224B 25B Service Guide 6 5 Replaceable Parts Rebuilt Exchange Assemblies Figure 6 1 Module Exchange Procedure...
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Страница 608: ...8 102 Keysight N5224B 25B Service Guide General Purpose Maintenance Procedures Correction Constants 8...
Страница 612: ...Appendix 4 Service Guide EEPROM Address Assignments and Location N5224 5A B PNA and N5244 5A B PNA X Instruments...
Страница 613: ...Installation Note Xxxxx xxxxx 3...